McCook is a narrow place wedged between big things — the Des Plaines, the canal, the quarry and the traffic pouring along I-55 — and every green thing here has had to earn its footing. Sinnott Tree Services Inc looks after what made it: trimming trees back from alleys, loading docks and the short front yards along the village streets, pruning what is worth keeping, removing what has turned brittle over a fence. Wind funnels down the river corridor and storms hit this stretch square, so storm damage cleanup is a standing part of the calendar, done quickly and swept clean. Nobody expects much canopy in a village this size, which is precisely why the trees that are here carry weight. Kept sound and tidy, they change the feel of a whole block.